After defining the UDT, you can create a table that has columns with the UDT. CQL
collection columns and other columns support the use of user-defined types, as shown in
Using CQL examples.

This example creates a user-defined type (UDT) cycling.basic_info_withTTL
that consists of personal data about an individual cyclist, which includes the
next_race column that will be set with a timestamp and time-to-live
(TTL).

Note: A string with a single quote in a UDT text field is returned with two quotes
in queries and COPY commands. For example, if you store the string
Single ' quote in a UDT text field, the string is
returned as Single '' Quote.